Wheel for grinding heads



I v I 1616 889 CRANE I WHEEL FOR QRINDING HEADS Filed Aug. 14, 1925gmmtoz LESLIE Carina; or nn'rrann, VERMONT, assrenon or onn-narir '10 r.a. rarer:

MANUFACTURING coMPAnY, or RUTLAND, VERMONT, a conroaa'rron or VER- MONT.

wnnnn non GRINDING rinans.

Application filed August 14, 1925. Serial no. 50,22o.

This invention relates to certain new and useful improvements in wheelsfor grinding heads for surfacing stone, such as granite, marble, orother stones, the object being to provide a wheel which is formed of aseries of concentrically arranged rings having projections on theirouter edges and depressions on their inner edges to cause the abrasionmaterial to be forced under the rings more rapidly, thereby reducing thetime required in bringing the granite surface to the required smoothnessfor receiving the gloss.

Another object of my invention is to provide a dressing wheel which isexceedingly simple and cheap in construction and one which can be usedin connection with any of the well known surfacing machines now in use.

A still further object ofthe invention is to provide'a surfacing wheelwhich can be manufactured very cheaply and one which is very strong anddurable, the rings being secured to bars in order to hold the same inthe proper position in respect to one another.

Other and further objects and advantages of the invention will behereinafter set forth and the novel features thereof defined in theappended claims.

In the drawings,

Figure-1 is an inverted plan view of a dressing wheel constructed inaccordance with my invention;

Figure 2 is a top plan View of the same; and

Figure 3 is a detail perspective view of a portion of the ring.

In the embodiment of my invention as herein shown, the dressing wheel isformed of .a plurality of concentrically arranged metal rings 1, 2, 3,i, 5, 6, 7 and 8, but it is, of course, understood that the number ofrings can be increased or decreased without departing from the spirit ofmy invention.

These rings are fixed to bars 9' and 10 to which is adjustably connecteda head 11 connecting the same to the driving spindle of a dressingmachine. In order to counter-balance the head, the outer rings 1, 2 and3 have secured to their upper faces bars 12 and 13.

The rings 3 to 8 are provided with oppositely disposedprojections 14forming depressions 15, the projection of the inner ring extending intothe depression of the adjacent ring and these depressions andprojections are preferably formed under the bars 9 and 10, but it'is, ofcourse, understood that while I have only shown each ring with twoprojections and two depressions, they can be increased or decreased andinstead of being arranged opposite to each other, they could bestaggeredly arranged without departing from the spirit of my invention;As the rings 3 to 8 respectively are constructed identically alikeexcept ac cording to size, the description of one ring will besuflicient for all as these rings of various sizes are arrangedconcentrically with the projections and depressions in the posi tion asclearly shown, the outer ring 1 being formed continuous without aprojection or depression and the ring 2 is provided with depressions toreceive the projections of the adjacent ring.

When the wheel is in operation for surfacing material which has a hard,crystalline formation, the abrasion material which is used in connectionwith the ring, is forced by the depressions and projections under thegrinding members formed by the rings as these concentric rings formgrinding members with flat faces so that the abrasion material is forcedrapidly from one ring to the other under the grinding face thereof so asto bring the granite surface to the required smoothness in a very shortlength of time.

While I have shown in the drawing and specification a grinding wheelconstructed of concentric rings forming grinding mem bers arranged in aparticular manner, I do not wish to limit myself to details ofconstructions and the manner, of connecting these rings together to forma grinding head or, Wheel as I am aware that various means can beemployed without departing from the spirit of my invention.

What I claim is 1. A dressing wheel formed of a series of concentricallyarranged rings, each ring having a radial projection on one edge and adepression on the other edge thereof.

2. A dressing wheel formed of a series of concentrically arranged rings,each ring having a depression on one edge thereof and a radialprojection upon the other edge thereof, the projection of one ringextending into the depression of the adjacent ring.

3. A dressing wheel formed of a series of concentrically arranged ringsforming gether by bars, each ring being proyided 10 grinding members,each ring being provided with a depression and a radial projection, Withradial projections and depressions, the the projection of one ringextending into projections and depressions in each ring bethe depressionof the adjacent ring'and aring disposed radially opposite, theprojecranged under the bars for connecting said tions of each ringprojecting into the derings together. i I 15 pression of the adjacentring. In testimony WhereofIhereunto afiix my 4. A dressing Wheel formedof a series of signature. concentrically arranged rings connected to-LESLIE CRANE.

